Roller wheel



FIG. 1 is a top, front and left side perspective view of a roller wheel, showing my new design;

FIG. 2 is a bottom, rear and left side perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of FIG. 3 ;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dashed broken lines in the figures are for the purposes of illustrating portions of the roller wheel, which form no part of the claimed design. 

CLAIM The ornamental design for a roller wheel, as shown and described. 